# ADR-0001: Hybrid Dual-WAN (failover + PCC office)

| Field | Value |
|-------|-------|
| Status | Accepted (live) |
| Date | 2026-06-13 (verified 2026-07-06) |

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## Context

Dua ISP: Biznet (ether1, IP publik statik) dan IDBiz (sfp-sfpplus1, DHCP). Butuh internet user kantor tetap jalan saat satu ISP down.

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## Decision

- **Failover** default route main: ISP1 `check-gateway=ping`, backup ISP2
- **Hybrid PCC** untuk office: scheduler `hybrid-sync-mode` + netwatch ISP1/ISP2
- Routing tables `KE ISP 1` / `KE ISP 2` + mangle marks
- Script deploy: `server-connection/scripts/apply-hybrid-mikrotik.ps1`

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## Consequences

**Positif:** Resiliensi ISP; office load-balance saat both up

**Negatif:** Kompleksitas troubleshooting; perubahan salah bisa putus internet seluruh kantor

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## References

- `server-connection/server/existing-network-geonet.txt`
- `backups/mikrotik-export-2026-07-06.rsc`